Below is a list of Riverton IA zip codes. For your research we have also included Riverton Area Code, Time Zone, UTC and the local Fremont County FIPS Code. Each Riverton Iowa zip code has a center Longitude / Latitude point (the Riverton center is -95.563003540039 / 40.686798095703). For your convenience we have also indicated if that zip code in Riverton observes Daylight Savings time.